Cheapest return PHL–ATL flights, September

AirHint found the following cheapest return flights from Philadelphia (PHL) to Atlanta (ATL) in September 2026 (see full year).

Return flights

03 Sep - 08 Sep Frontier Airlines
18 Sep - 21 Sep Frontier Airlines
04 Sep - 07 Sep Frontier Airlines
24 Sep - 26 Sep Frontier Airlines
24 Sep - 24 Sep Frontier Airlines
12 Sep - 16 Sep Delta direct
03 Sep - 08 Sep Delta direct
12 Sep - 17 Sep Delta direct
24 Sep - 26 Sep Delta direct
18 Sep - 21 Sep Delta direct

Also check the deals for one-way flights from Philadelphia to Atlanta in September.

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The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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